This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 12 |
| 4 | 49 |
| 5 | 86 |
| 6 | 492 |
| 7 | 736 |
| 8 | 3977 |
| 9 | 8757 |
| 10 | 34030 |
| 11 | 59060 |
| 12 | 384924 |
| 13 | 531454 |
| 14 | 2672528 |
| 15 | 6672552 |
| 16 | 26093113 |
| 17 | 43046738 |
| 18 | 261646137 |
| 19 | 387420508 |
| 20 | 2181624374 |
| 21 | 4682526672 |
| 22 | 17435870644 |
| 23 | 31381059632 |
| 24 | 204908769276 |
| 25 | 299863458511 |
| 26 | 1412168408630 |
| 27 | 3392641222200 |
| 28 | 13912336721584 |